Dipper-tooth designed for use on shovels



S. F. MAcDOUGALD AND E. E. BOHAN.

DIPPER TOOTH-DESIGNED FOR USE ON SHOVELS.

. APPLICATION FILED JUNE I, 1.920; I IAOLSOQ, Patented Dec. 27,1921.

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. Application filed June 1, 1920.. serial-No. 385,7'131 To all whom it may concern.-

Be it known that we, SNO\V-.FREEMAN MACDOUGALD, and EDWARD ERNEST BOHAN, subjects of the King of Great Britain, residents of the town of Cap Tourmente, county of Montmorency, Province of Quebec, Dominion of Canada, have invented certain new and useful Improvements in Dipper- .Teeth Designed for Use on Shovels, of

tion, reference is made to the accompanying drawings illustrating an embodiment of the same and in which:

Figure 1 is a perspective view of our improved dipper teeth. f

Fig. 2 i a perspective view of the shank of the dipper teeth.

Fig. 3 is a perspective view of the point of the dipper tooth.

Fig. 4 is an enlarged side elevation partly sectional of the improved dipper tooth.

Fig. 5 is a transverse section through the same.

Fig. 6 is an enlarged side elevation of the point of the improved dipper tooth.

Fig. 7 is an enlarged side elevation of the body and shank of the improved dipper tooth.

Like characters of reference refer to like part in the several figures.

Referring to the drawings; A represents the improved dipper tooth comprising a body portion 10 formed with a shank 11 provided with orifices 12 therethrough with which bolts or rivets may be engaged to securethe tooth to the dipper.

The body portion is provided with an arm 13 which is of shorter length than the shank 11 and between the arm 13 and the shank 11, the edge of the dipper will be embraced.

The front end of the body portion hasits upper and lower walls, tapered as shown at 14 and a central recess 15 is also provided. On the upper and lower faces of the body portion 10, a pair of U-shaped dove-tailed recesses 16 are formed.

The point 17 of the tooth is removable and is provided with a pair of lugs 18BX- the width of the V-shaped re esses 19 and extends between the upper and lower dovetalled lugs 18, and this web 20 engages with the center recess 15 in the body portion 10. The point 17 is secured to the body portlon by rivets 21 or the like, passing through the lugs 18 and the body portion 10, and the lower face 22 of the form a cutting edge.

When this tooth is-in use, the point 17 is assembled to the body portion 10 as shown 111 Flgs. 1 and 4, and the shank 11 is secured to the dipper by bolts or rivets passing through the orifices 12.

Should a point 17 become worn out, it can. be removed from the tooth 'by withdrawing the rivet 21 and a new point 17 can be engaged by the body portion 10 of the tooth.

The tooth possesses great strength and rigidity and the point can be removed, sharpened and replaced with case.

As many changes could be made in the above construction and many widely differpoint 17 is beveled to .ent embodiments of our invention within in the accompanying specification and drawings shall be interpreted as illustrativeand not in a limiting sense.

'VVhat we claim as our invention is:

A dipper tooth comprising a body portion formed with upper and lower walls tapering to a point and having a central recess therein, U-shaped dovetail recesses on the upper and lower faces of said body portion, a shank for the body portion having orifices therein, an arm partially extending, parallel with and spaced from said body portion to receive the edge of the dipper between said arm and said shank, a tooth having a removable point and provided with a pair of dovetailed lugs adapted to fit the dovetail recess in the faces of the'body portion, V-shaped recesses in the side Walls of the tooth-point to engage with the tapered edges of the upper and lower Walls of the body portion, a center Web intermediate of the said V-shaped recesses in the tooth point adapted to engage the central recesses in the body portlon, securing 1 ,eoreoe means passing through the tooth and through the body portion. e

In Witness whereof We have hereunto set [our hands in the presence of two Witnesses.

SNOW FREEMAN R'EMDOUGALD. EDWARD ERNEST EOHAN.

point lugs 10 Witnesses:

ALEXANDER MoPHEnsoN, JoHN BELLEMORE. 

